Wednesday, February 23, 2022

1961+2008 I-95+495 Woodrow Wilson Memorial Bridges over Potomac River

1961: (Bridge Hunter)

escsi
The deck was replaced and widened in 1982-83 with precast panels that used novel lightweight aggregate concrete and post-tensioning.

RosalesPartners, 1 of 10
"Curved steel girders & V-shaped concrete piers"

Structurae, ID 17157
"The new 12-lane bridge includes 4 side-by- side, double leaf bascule spans, each with a 82m (270') center-to-center trunnion spacing and an overall bridge width of 76m (250'). The bascule span is supported on delta-shaped concrete bascule piers. Provides a 53m (175') horizontal channel for navigation. Open position affords unrestricted vertical clearance within designated channel and a 21m (70') minimum vertical clearance, span closed, for navigation."

aisc
2009 Special Purpose Award, $680m

aecom
"The $2.35 billion Woodrow Wilson Bridge Project was featured on the Discovery Channel’s Extreme Engineering Series and was termed 'the world’s largest drawbridge.' The Project has received over 70 major awards, including ASCE’s Opal Award, and has been referred as ‘Washington DC’s Newest Monument’ which has successfully eliminated the worst traffic bottle neck on Interstate 95 between Maine and Florida."
[I can't reconcile the $2.35b cost with the $600m and $680m figures I saw in other sources. Perhaps the billions include highway interchange improvements and environmental protection projects as well as the bridge itself.]
The 1000 steel pipe piles where up to 72" in diameter and 210' long. "Amazingly, over the course of 15 years of design and construction, the cost of the project was actually reduced by $86 million from the original estimate of $2.44 billion to the final cost of $2.35 billion, thanks to diligent program management and cost control by AECOM and our partners."

Bridges Now and Then posted
Building the Woodrow Wilson Bridge over the Potomac River, linking Oxon Hill, Maryland, and Alexandria, Virginia, 2005. (Sanjay Arwade)
Structurae, ID 59124

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